Deflection yoke for television receivers

ABSTRACT

A deflection yoke for use in television receivers is provided in which a flange section for encasing a spread rear portion of a horizontal deflection coil has a continuous circumferential concave groove on its outer periphery, thereby providing for accomodation of circuit elements in the concave groove.

United States Patent Nishida [54] DEFLECTION YOKE FOR TELEVISION RECEIVERS [72] Inventor: -Koji Nishida, Tokyo, Japan [73] Assignee: Denki ()nkyo Co., Ltd., Tokyo,

Japan 22 Filed: May 25,1970

21 Appl.No.: 40,267

[30] Foreign Application Priority Data May 24, 1969 Japan ..44/48171 s2 U.S.Cl ..335/210,3l3/76 511 Int.Cl ..n01r7/00 5s FieldofSearch ..335/209,l,2l3;3l3/76;

[ 1 Aug. 15,1972

[56] References Cited UNITED STATES PATENTS 3,390,363 6/1968 Weyrich et al. ..335/210 3,163,794 12/1964 Bloomsburgh et al ..313/76 3,350,592 l0/1967 Mason ..313/76 Primary Examiner-J. V. Truhe Assistant Examiner-Gale R. Peterson Attorney-James E. Armstrong and Ronald S. Cornell [57] ABSTRACT A deflection yoke for use in television receivers is provided in which a flange section for encasing a spread rear portion of a horizontal deflection coil has a continuous circumferential concave groove on its outer periphery, thereby providing for accomodation of circuit elements in the concave groove.

6 Claims, 4 Drawing Figures PATENTEUwc 15 m2 1 NVEN TOR.

BACKGROUND OF THE INVENTION Conventional deflection yokes heretofore have been constructed as follows:

An insulating hom-shaped bobbin has a vertical deflection coil positioned on its outer face and a horizontal deflection coil positioned on its inner face.

The bobbin is provided at its tapered rear portion on the electron gun side with an annular terminal strip which has an aperture in the center thereof, thus providing space to dispose such circuit elements as capacitors and resistors on the terminal strip. In addition, the terminal strip is capped with a back cover having a flange section to receive therein the rear-end spread edges of the horizontal deflection coil.

Thus constructed, the conventional deflection yoke has following the disadvantages The circuit elements are mounted on the surface of the terminal strip, thus requiring a terminal strip having a large surface area, resulting in a disadvantageous increase in material cost. Furthermore, the circuit elements are positioned near to the rear-end spread edges of the horizontal deflection coil, with the result that the deflection yoke lacks electrical stability.

The terminal strip is constructed by fitting together from opposite directions a pair of semicircular insulating plates into a very small gap formed between the rear portion of the bobbin and the rear portion of the vertical deflection coil, with the result that the terminal strip is difficult to attach and often functions poorly.

The present invention provides a deflection yoke which sufficiently isolates the circuit elements and the horizontal deflection coil, and which also assures insulation between the circuit elements and the horizontal deflection coil. Further, through elimination of the terminal strip as constructed according to the prior art, a

simplified, easy to assemble deflection yoke is provided.

SUMMARY In accordance with the invention, a deflection yoke is provided comprising a horn-shaped insulating bobbin having a central aperture, said bobbin consisting of a co-joined pair of half-bobbins, a horizontal deflection coil mounted on the inner face of said bobbin, a vertical deflection coil mounted on the outer face of said bobbin, a flange section provided to receive a rear-portion spread edge of said horizontal deflection coil at the rearward portion of a tapered smaller end of said bobbin, a plurality of protruding divided lock segments on the periphery of said aperture, a concave circumferential groove formed on the outer periphery of said flange section, an insulating terminal strip positioned in said concave groove in close contact with the grooved bottom thereof, a plurality of terminals secured on said terminal strip, and circuit elements mounted on said terminals.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be more clearly understood from the following detailed description of the invention when considered in conjunction with the accompanying drawings, wherein FIG. 1 is a side view, in longitudinal section, of a deflection yoke according to the invention;

FIG. 2 is a plan view of the deflection yoke shown in FIG. 1

FIG. 3 is a rear view of the deflection yoke, with an annular cap thereof removed therefrom and FIG. 4 is a side view of a half-bobbin for use in the deflection yoke of the invention.

DETAILED DESCRIPTION In the drawings, there is shown a deflection yoke body comprising an insulating bobbin 11 having a pair of half-bobbins 11a, 1 la joined together generally in the form of a horn, a horizontal deflection yoke 12, fitted on the inner face of bobbin 11 and composed of a pair of saddle-type coils, a fem'te core 13 fitted on the outer face of bobbin 11, and a vertical deflection coil 14 composed of a pair of coils which are toroidalwound on the ferrite core 13.

At the rear portion of the tapered end of bobbin 1 l, a hollow flange section made of an insulating material is formed as an integral portion of bobbin 11. The flange section 20 comprises a pair of half flange mumbers 21, 21 joined-together each, as shown in FIG. 4, being located at the rear portion of the half bobbin 11a, and being adapted to receive the rear spread edges 12a of horizontal deflection coil 12 into an interior vacant chamber 22.

At the back of the flange section 20, there is located a central aperture 23 for inserting the neck of a picture tube. From the peripheral parts of aperture 23, divided lock segments or tongues 24 extending in an outward direction from the back of flange section 20.

A continuous concave circumferential groove is provided on the outer periphery of the flange section 20, groove 30 being positionally secured by a band-like elastic terminal strip made of an insulating material, wound around the outer periphery.

The terminal strip 40 is secured with a required number of terminals 41 respective portions of which are connected to both the horizontal and vertical deflection coils, and these terminals are mounted thereon with circuit elements 42, connected through terminals 41 to the horizontal and vertical deflection coils.

The concave groove 30 is capped with an annular cover to close the groove, cover 50 being formed as shown in FIG. 3 by fitting together two semi-annular cover members 51, 51' onto flange section 20 from opposite directions.

Cover members 51, 51 of cover 50 are each provided with at both ends, coupling means 52, which are adapted to join the cover members to each other.

In addition, the cover 50 is provided with a take-out aperture 53 for taking out lead wires 60, so that lead wires 60, extend outwardly from the cover through aperture 53.

An alternate embodiment of the deflection yoke of the invention is constructed as follows Although the bobbin l1 and the flange section 20 are usually formed integrally as shown in FIG. 4, a flange section 20 having a central aperature for insertion of a picture tube can be made as a separate unit which is secured to the rear portion of bobbin 11.

The cover members 51, 51' constituting the annular cover 50 are preferably constructed as shown in FIG. 1 in the form of C-shaped sections, thus forming an arcuate concave groove 54 open on the inner periphery thereof. Each member is provided with concave fitting grooves 55, 55 at the opposed inner peripheral edges thereof thus permitting a close fit between these grooves 55, 55 and both walls 31, 31' of the concave groove 30 which is formed at theflange section 20, whereby the cover members 51, 51' are secured on the outer periphery of the flange section 20. With such construction, the concave groove 30 of the flange section and the arcuate concave groove 54 of the cover 50 provide an interior chamber R sufficiently large to receive therein the terminals 41.

In such a manner, prior to attachment of the annular cover 50 the terminals 41, as shown in FlG.'-3, protrude outwardly from concave groove 30 of flange section 20, making it easy to solder taken-out ends of the deflection coils to the terminals.

Using such construction, it is necessary to. previously provide an aperture in wall 31 of concave groove 30 or cover 50 in order to provide passagefor the extending ends of the deflection coils.

The annular cover 50 is sometimes not required. In this case, however, the concave groove 30 of the flange section is should be sufficiently deep.

Since the deflection yoke of the invention is formed with the concave groove 30 on the outer periphery of the flange section 20 to receive the circuit elements 42, the circuit elements can be sufficiently 'spaced apart from the rear-end spread edge 12a of the horizontal deflection coil and the grooved bottom of the concave groove 30 can assure insulation between the circuit elements and the rear-portion spread edge of the horizontal deflection coil. Furthermore, since it is not necessary to use half and semi-circular insulating plates, assembly of the deflection yoke is advantageously sim plified. Since, according to the invention a band-like terminal strip, rather than one having a large surface area, can be used the deflection yoke of the invention offers the advantage of reduced material cost.

While the invention has been described with reference to some preferred embodiments, various changes and modifications will be apparent to those skilled in the art.

lclaim:

l. A deflection yoke comprising a. a horn-shaped insulating bobbin having a central aperture and inner and outer faces, said bobbin consisting of a co-joined pair of half-bobbins each having a rearward tapered smaller end portion,

. a horizontal deflection coil mounted on the inner face of said bobbin and having a rear-portion spread edge juxtaposed to said rearward tapered smaller end portions of said half-bobbins,

c. a vertical deflection coil mounted on the outer face of said bobbin,

d. a flange section having an outer periphery and provided to receive the rear-portion spread edge of said horizontal deflection coil at the rearward tapered smaller end portions of said half-bobbins,

e. a plurality of protruding divided lock segments disposed around said aperture,

f. a concave circumferential groove facing outwardly in the radial direction, having a bottom and formed on the outer periphery of said flange section, I

g. an insulating terminal strip positioned in said concave groove in close contact with the bottom thereof,

h. a plurality of terminals secured on said terminal strip, and

i. circuit elements mounted on said terminals.

2. A deflection yoke according to claim 1, wherein said concave groove of said flange section having positioned therein said circuit elements is capped with an annular cover to enclose said groove.

3. A deflection yoke according to claim I, wherein said flange section consists of a pair of half-flange members each formed with a circumferential concave groove on its outer periphery and formed integrally with the rearward tapered smaller end portion of each of said half-bobbins, whereby said horn-shaped bobbin and said flange section are integrally constructed.

4. A deflection yoke which comprises a. a horn-shaped insulating bobbin having a central aperture, said bobbin consisting of a co-joined pair of half-bobbins,

. a horizontal deflection coil mounted on the inner face of said bobbin,

c a vertical deflection coil mounted on the outer face of said bobbin,

. a flange section provided to receive a rear-portion spread edge of said horizontal deflection coil at the rearward portion of a tapered smaller end of said bobbin,

e. a plurality of protruding divided lock segments on the periphery of said aperture,

f. a concave circumferential groove facing outwardly having a bottom and formed on the outer periphery of said flange section,

g. an insulating terminal strip positioned in said concave groove in close contact with the grooved bottom thereof, said terminal strip being an elastic band wound in said concave groove,

h. a plurality of terminals secured on said terminal strip, and

i. circuit elements mounted on said terminals.

5. A deflection yoke according to claim 4, wherein said half-annular cover members are C-shaped sections which form, when joined, an arcuate concave groove, open on the inner peripheral side and having concave fitting grooves at opposed inner peripheral edges, whereby said concave fitting grooves are fitted closely to both walls of said concave groove of said flange section, thereby serving to mount said cover members on said flange section.

6. A deflection yoke comprising a horn-shaped insulating bobbin having a central aperture and inner and outer faces, said bobbin consisting of a co-joined pair of half-bobbins each having a rearward tapered smaller end portion,

b. a horizontal deflection coil mounted on the inner face of said bobbin and having a rear-portion spread edge juxtaposed to said rearward tapered smaller end portions of said half-bobbins,

c. a vertical deflection coil mounted on the outer face of said bobbin,

v e. a plurality of protruding divided lock segments d. a flange section having an outer periphery and thereof, I

provided t r C iv t rea -por i p e d g h. a' plurality of terminals secured on said terminal of said horizontal deflection coil at the rearward strip, tapered smaller end portions of said half-bobbins,

i. circuit elements mounted on said terminals, and j. an annular cover enclosing said concave circumferential groove composed of two opposing halfi' g i g gi g i z gf aggl fl az x ggg annular cover members which are fitted on the formed on the outer p ip y g Said flange outer periphery of said flange section, each of said tion, 10 cover members being provided at both ends with g. an insulating terminal strip positioned in said concouplmg means forjommg clover members cave groove in close contact with the bottom disposed around said aperture, 

1. A deflection yoke comprising a. a horn-shaped insulating bobbin having a central aperture and inner and outer faces, said bobbin consisting of a co-joined pair of half-bobbins each having a rearward tapered smaller end portion, b. a horizontal deflection coil mounted on the inner face of said bobbin and having a rear-portion spread edge juxtaposed to said rearward tapered smaller end portions of said halfbobbins, c. a vertical deflection coil mounted on the outer face of said bobbin, d. a flange section having an outer periphery and provided to receive the rear-portion spread edge of said horizontal deflection coil at the rearward tapered smaller end portions of said half-bobbins, e. a plurality of protruding divided lock segments disposed around said aperture, f. a concave circumferential groove facing outwardly in the radial direction, having a bottom and formed on the outer periphery of said flange section, g. an insulating terminal strip positioned in said concave groove in close contact with the bottom thereof, h. a plurality of terminals secured on said terminal strip, and i. circuit elements mounted on said terminals.
 2. A deflection yoke according to claim 1, wherein said concave groove of said flange section having positioned therein said circuit elements is capped with an annular cover to enclose said groove.
 3. A deflection yoke according to claim 1, wherein said flange section consists of a pair of half-flange members each formed with a circumferential concave groove on its outer periphery and formed integrally with the rearward tapered smaller end portion of each of said half-bobbins, whereby said horn-shaped bobbin and said flange section are integrally constructed.
 4. A deflection yoke which comprises a. a horn-shaped insulating bobbin having a central aperture, said bobbin consisting of a co-joined pair of half-bobbins, b. a horizontal deflection coil mounted on the inner face of said bobbin, c. a vertical deflection coil mounted on the outer face of said bobbin, d. a flange section provided to receive a rear-portion spread edge of said horizontal deflection coil at the rearward portion of a tapered smaller end of said bobbin, e. a plurality of protruding divided lock segments on the periphery of said aperture, f. a concave circumferential groove facing outwardly having a bottom and formed on the outer periphery of said flange section, g. an insulating terminal strip positioned in said concave groove in close contact with the grooved bottom thereof, said terminal strip being an elastic Band wound in said concave groove, h. a plurality of terminals secured on said terminal strip, and i. circuit elements mounted on said terminals.
 5. A deflection yoke according to claim 4, wherein said half-annular cover members are C-shaped sections which form, when joined, an arcuate concave groove, open on the inner peripheral side and having concave fitting grooves at opposed inner peripheral edges, whereby said concave fitting grooves are fitted closely to both walls of said concave groove of said flange section, thereby serving to mount said cover members on said flange section.
 6. A deflection yoke comprising a horn-shaped insulating bobbin having a central aperture and inner and outer faces, said bobbin consisting of a co-joined pair of half-bobbins each having a rearward tapered smaller end portion, b. a horizontal deflection coil mounted on the inner face of said bobbin and having a rear-portion spread edge juxtaposed to said rearward tapered smaller end portions of said half-bobbins, c. a vertical deflection coil mounted on the outer face of said bobbin, d. a flange section having an outer periphery and provided to receive the rear-portion spread edge of said horizontal deflection coil at the rearward tapered smaller end portions of said half-bobbins, e. a plurality of protruding divided lock segments disposed around said aperture, f. a concave circumferential groove facing outwardly in the radial direction, having a bottom and formed on the outer periphery of said flange section, g. an insulating terminal strip positioned in said concave groove in close contact with the bottom thereof, h. a plurality of terminals secured on said terminal strip, i. circuit elements mounted on said terminals, and j. an annular cover enclosing said concave circumferential groove composed of two opposing half-annular cover members which are fitted on the outer periphery of said flange section, each of said cover members being provided at both ends with coupling means for joining said cover members. 